[Ips-dhfpr] ASWFC Daily HF Prop Report - 03 July 25 issued 2330 UT on 03 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/03 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 JULY) 
Date   T index  Conditions    
03 Jul    85    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Depressed by 25% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
      Depressed by 25% after local dawn.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jun      79
Jul      104
Aug      102


2. FORECAST (04 JULY - 06 JULY)
Date   T index  Conditions       MUFs                              
04 Jul    70    Normal-fair      Depressed 10 to 20%/near predicted 
                                 monthly values
05 Jul    70    Fair-normal      Depressed 10 to 20%/near predicted 
                                 monthly values    
06 Jul    75    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 3-Jul were 25% depressed to near predicted values. 
Spread F was observed during local night hours at Brisbane, Hobart 
and Townsville. MUFs are generally expected to be 15-20% depressed 
to near predicted values over 4-6 Jul, with mildly degraded HF 
conditions during local night hours for the southern Australian 
region during 04-05 Jul in association with mild geomagnetic 
activity induced by a coronal hole wind stream.

----------------------------------------------------------
For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au